package com.hmdp.utils;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.hmdp.dto.UserDTO;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@Slf4j
@RequiredArgsConstructor
public class RefreshTokenInterceptor implements HandlerInterceptor {
    private final StringRedisTemplate stringRedisTemplate;
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //1.获取请求头中的token
        String token = request.getHeader("authorization");
        //2.获取redis的用户
        String  key= RedisConstants.LOGIN_USER_KEY+token;
        if (StrUtil.isBlank(token)){
            return true;
        }
        Map<Object, Object> userMap = stringRedisTemplate.opsForHash()
                .entries(RedisConstants.LOGIN_USER_KEY + token);
        //3.判断用户是否存在
        if (userMap.isEmpty()){
            return true;
        }
        //5.将查询到的hash数据转为userDTO对象
        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);
        //6.存在保存信息到threadLocal
        UserHolder.saveUser(userDTO);
        //7.刷新token有效期限
        stringRedisTemplate.expire(key,RedisConstants.LOGIN_USER_TTL, TimeUnit.MINUTES);
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        //移除用户
        UserHolder.removeUser();
    }
}